JJ preflop

I was playing PartyPoker 500k guar. 440 of the initial 2650 participants were left (400+ is ITM but only top 60 paid more than 5x buy-in).

Blinds are 200/400, I've worked my stack up to around 9800.

UTG+1 (~18k) opens up for 1400 (3.5bb). He seems quite solid but I haven't been on the table for more than 3 orbits.

I pick up JJ in the big blind.

Whats my line here?