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If "Al" in your post means "Aluminium", then at normal condition it is solid metal, and its volume does not measure in liters.
In this case the volume measures in cubic centimeters or cubic decimeters.
If it is in liquid state (at high enough temperature), then it should be stated in the condition.
In this case, again, its volume does not measure in liters. It measures in cubic centimeters or cubic decimeters.
In any case, the mass is the volume times the density.
For solid aluminium, the density is 2.70 g/cm^3.
For liquid aluminium, the density is 2.375 g/cm^3.
For the reference use this Wikipedia article
https://en.wikipedia.org/wiki/Aluminium
