tough spot with AK

[mmix85]

The game is 5-10 nl at a casino. We are playing 3 handed with a straddle to 20 on the button. I have around 1300 and villian has me covered. I raise to 75 with AK in the bb. Button calls. Flop is Ks9c7s I bet out 125 into the 170 pot. Villian makes it 325. What line should I take here. Should I make a raise on the flop effectivly committing myself, or call and reevaluate on turn. Both options seemed bad to me. I actually called and a 8h came on turn. Now what?