Answer
The IUPAC name of the alkene is $1-cyclohexylcyclohexa-1,3-diene$
Work Step by Step
The compound has 6 carbon atoms in its longest carbon ring containing the double bond ($cyclohex−$). It has an $cyclohexyl−$ substituent at position 1, and 2 double bonds at positions 1 and 3. So, the IUPAC name of the alkene is $1-cyclohexylcyclohexa-1,3-diene$