Questionable flop raise

[Vazh]

Is this pot big enough to justify this flop raise?

Party Poker 5/10 Hold'em (8 handed)

Preflop: Hero is MP2 with Q[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/spade.gif[/img].
<font color="666666">1 fold</font>, UTG+1 calls, <font color="666666">1 fold</font>, Hero calls, <font color="666666">1 fold</font>, Button calls, SB completes, BB checks,

Flop: (5 SB) 4[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="blue">(5 players)</font>
SB checks, BB checks, <font color="CC3333">UTG+1 bets</font>, <font color="CC3333">Hero raises</font>, Button folds, SB folds, BB folds, UTG+1 calls.

Turn: (4.50 BB) 9[img]/images/graemlins/spade.gif[/img] <font color="blue">(2 players)</font>
UTG+1 checks, Hero checks.

River: (4.50 BB) 7[img]/images/graemlins/spade.gif[/img] <font color="blue">(2 players)</font>
UTG+1 checks, Hero checks.

Final Pot: 4.50 BB
<font color="green">Main Pot: 4.50 BB, between UTG+1 and Hero.</font>