Simplify the following text for a Grade 9 native English-speaking person.
Original: A cubic centimetre ( or cubic centimeter in US English ) ( symbol cm3 â '' the abbreviations cc and ccm , though widely used , are deprecated ) is a commonly used unit of volume extending the derived SI-unit cubic metre , and corresponds to the volume of a cube measuring 1 cm Ã -- 1 cm Ã -- 1 cm .
Simplified: A cubic centimetre ( symbol cmÂ or cc ) ( U.S. spelling : cubic centimeter ) is a commonly used unit of volume extending the derived SI-unit cubic metre and corresponds to the volume of a cube measuring 1 cm Ã -- 1 cm Ã -- 1 cm .