I've been with chase since I've first started with credit cards in 2011. The freedom was the first I had, and like you, was granted a whopping $500. Fast forward three years later and I'm up to all of $1300. All my cards except one are with chase, and I've found that if I use it to the point of almost completely reaching my limit (as in maybe $100 or $200 shy) and then paying it off in full before the cycle is up, I see an automatic cli within the next two statements.
The most recent example. Started off with the Amazon card having $1900, pushed it to about $1700 when I moved in June and saw and increase to $2200 the next month. I put my upcoming cruise on the card in December--a total of $1700--plus other expenses, and had my balance reach close to $2000. Paid it all off before the next due date. By the end of January my limit had automatically increased to $4400. Yes, two times what I had before.
So basically...incredibly long response cut short. Show them that you are good for their business and that they can trust that you'll pay em back. If I did my math correctly, you have a little more than $7k in available credit. I'd say once you pay off your balances, use your freedom as much as you can and if you're comfortable, push it to maybe 400 or so and then pay it off before or by the due date. Do that a couple times, and both you and chase will be very happy. You'll have a high utilization on that card for a little, but in the long run once they increase your limit automatically you should be good to go.