This is a terrible flop...and out of position, you need to be careful here. I think I would put another bet out there...maybe pot. Your opponent wouldn't be sticking around with this flop unless he hit it. My guess would be a pair and a straight draw, possibly KQ or KJ. He probably doesn't have JQ because I would imagine he would raise you on the flop to define his hand. He could be slow playing AK but I would expect a re-raise pre-flop. I think it's safe to assume you have the best hand right now, but i'd be ready ot dump this if he raises or if a scare card comes on the river.