50nl: Bluff this river?

[blackize]

Villain is 55/13/1.67 over 50 hands. Basically a station on the flop but he has donked into me on the turn a couple times and has been frequently donking the river as well.

My question isn't really about this hand but about hands such as this against similar opponents. His range seems polarized as either a weak one pair hand or a whiffed draw. How standard is a river bluff? Should I be trying it more often?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
5 players
Converter

Stack sizes:
UTG: $30
Hero: $51.10
Button: $57.40
SB: $57.30
BB: $19.25

Pre-flop: (5 players) Hero is CO with 6[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/diamond.gif[/img]
UTG (poster) checks, <font color="#cc0000">Hero raises to $2.25</font>, 3 folds, UTG calls.

Flop: 3[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] ($5.25, 2 players)
UTG checks, <font color="#cc0000">Hero bets $2.5</font>, UTG calls.

Turn: 3[img]/images/graemlins/heart.gif[/img] ($10.25, 2 players)
UTG checks, Hero checks.

River: T[img]/images/graemlins/diamond.gif[/img] ($10.25, 2 players)
UTG checks, Hero checks.

Results:
Final pot: $10.25