[fnurt]

There are two possible lines here:

1) Push, and hope he doesn't have an ace.

2) Check behind, and hope he gives you some action on the turn.

Betting something like 400 is pointless because you cannot fold to a raise of only 300 more. Likewise, thinking there is any line that will get him to lay down an ace is pointless.

If you are ahead on the flop, he most likely has no more than 2 or 3 outs on the turn. That's a risk I am willing to take, so I check behind and call a turn bet if he pushes.