ORA-03297: file contains used data beyond requested RESIZE value

To identify segment, then to the specified size:

SELECT DISTINCT owner, segment_name, segment_type, tablespace_name, file_id

FROM dba_extents

WHERE ((block_id+1)*(SELECT value FROM v$parameter

WHERE UPPER(name)='DB_BLOCK_SIZE')+BYTES) > (3000*1024*1024)

AND tablespace_name='SYSAUX'

ORDER BY file_id, owner, segment_name, segment_type;