What is the volume of a cube with surface area 54x2?

What is the volume of a cube with surface area 54x²?

1. 9x^{2 NO}
   
2. 27x^{3 YES}
   
3. 81x^{2 NO}
   
4. 81x^{3 NO}
   
5. 729x^{3 NO}