You can still pay up to £2880, provided you are under 75. PTM044100 advises that "an individual can have tax relief in respect of any relievable pension contributions provided the individual is:- an active member of a registered pension scheme and a relevant UK individual, in the tax year in which the contribution is paid. Tax relief can only be claimed for the tax year that the contribution is actually made".
It also states "where a member’s relevant UK earnings chargeable to tax are less than £3,600, tax relief on the amount of any contribution over the level of their earnings up to the £3,600 limit can only be given if the contribution is paid to a pension scheme that operates the relief at source (RAS) system.
PTM044100 - Contributions: tax relief for members: conditions