You might be able to, as long as there is something filling that big space with CO2, in other words, while it is still fermenting, but that doesn't last all that long, after you rack it. You don't want that much surface area of wine exposed to oxygen. If it were me, I would ignore the racking into "secondary", clamp the lid down tight, attach an airlock and let it finish in the bucket. Then rack into a carboy fairly soon (10-14 days) after putting the lid and airlock on.