Without reads, its a little tougher, but most opponents besides the weak tight/calling station variety will bet with top pair. You might be behind to MPGK but if you are, a nice bet might force him off his hand. You also might be behind to a set, in which case you are in real trouble and only have 4 outs, but I'd discount that cuz most players would bet with a set on this draw heavy board.

Since you have 750 in your stack and the pot is 725, I'd take a shot at it and go all in, if he has TJ, he might fold here with only 1 card to see and probably thinks his jack or ten are no good, if he doesn't have the king, he probably folds too, I'd push this and represent the king trying to get rid of the draws. If you get called, you probably have some decent outs (2 9's, 3 7's, 4 6's, bout the same as a flush draw, unless he is chasing the flush draw or the straight draw, then you are ahead and don't want to see alot of those cards).