I like making it 4x in those situations unless I have a read otherwise (I don't know why 4x instead of 3x but I usually do it with any two cards). I don't really see what betting that flop accomplishes. I guess you could maybe get some value from lower pocket pairs, but what other hand is gonna play back at you that you can beat? I'd check behind him, but fold if I had already bet pot on the flop (Why do you bet so big if you plan on folding to a raise..?).