Semibluffing on turn with 8 outs or less?

[Malifous]

PokerStars 0.25/0.50 Hold'em (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is MP1 with T[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/club.gif[/img].
UTG calls, <font color="#666666">1 fold</font>, Hero calls, <font color="#666666">1 fold</font>, MP3 calls, CO calls, <font color="#666666">2 folds</font>, BB checks.

Flop: (5.40 SB) 7[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
BB checks, UTG checks, Hero checks, MP3 checks, CO checks.

Turn: (2.70 BB) Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
BB checks, UTG checks, <font color="#CC3333">Hero bets</font>, MP3 folds, CO folds, BB folds, UTG folds.

Final Pot: 2.70 BB

Results were nice but afterwise i felt i played this hand like sack of [censored]. Would you need flushdraw + straightdraw to make this move +ev in the long run mathematically?