Call this turn with AK?

[KnowReturn]

I don't have much of a read on BB, only played 10 hands but they have not yet played a hand.

Full Tilt 2/4 Hold'em (6 handed)

Preflop: Hero is SB with K[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">3 folds</font>, Button calls, <font color="#CC3333">Hero raises</font>, BB calls, Button calls.

Flop: (6.50 SB) 7[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, BB calls, Button calls.

Turn: (4.75 BB) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, Button folds,

Hero?

Probably should have bet the turn but was hoping for a free card. Regardless, I'm thinking villain doesn't have KQ or AQ or would have raised the flop. So I'm thinking I have at least four outs with the non heart A and K, and the AKh is worth maybe a half an out. I have 2 outs with the non heart Js and half an out with the Jh. So I'm figuring I have 7.5 outs getting 5-1. Also, if I call here am I committing myself to C/C on the river if I miss?