NL25: JJ vs. preflop RR

[Somekid]

I just sat down at the table, so no reads. Is simply calling PF alright? Also, is my flop line a giant spew?

Poker Stars
No Limit Holdem Ring game
Blinds: $0.10/$0.25
6 players
Converter

Stack sizes:
UTG: $30.40
UTG+1: $23.10
CO: $15
Hero: $24.40
SB: $4.75
BB: $31.30

Pre-flop: (6 players) Hero is Button with J[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/heart.gif[/img]
2 folds, CO (poster) checks, <font color="#cc0000">Hero raises to $1.25</font>, SB folds, <font color="#cc0000">BB raises to $3</font>, CO folds, Hero calls.

Flop: 6[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/club.gif[/img] ($6.35, 2 players)
<font color="#cc0000">BB bets $5.75</font>, <font color="#cc0000">Hero raises all-in $21.4</font>

I'm not sure if this is okay or not. I obviously can't fold, so the decision is between calling, raising, and shoving. I decided to push the flop since I could be ahead of a large part of the SB's range, and many possible turn cards are scary. For example, if a heart or overcard falls on the turn and my opponent fires again, i'm in a tough spot. That being said, my line might be way too aggressive.