it's not weather it will fit or not. and the volume of the empty enclosure doesnt matter as much as the volume of the loaded enclosure with the eub mounted in it. the huge magnet structure and basket take a lot away. if you mount it inverted, then you will get the full volume of the enclosure.
i believe it will work, but i dont know how good it will sound and how good it will be for the subwoofer itself.