You can't. A CVV is a randomly generated 3 or 4 digit number associated with a specific card and is imprinted on it when the card is manufactured.
Can you look up your CVV number?
Finding your CVV depends on the type of card you have. For Visa, Mastercard and Discover cards, you'll find the three-digit code on the back, usually inside or just above the signature strip. American Express does things differently, placing a four-digit CVV on the front, above the Amex logo.
Can I find my credit card security code online?
Your card security code (CSC), verification code (CVC), or card code verification (CCV) can be found on the back of your card and is usually three or four characters long. This code provides an additional measure of credit card security when you use your card online.
Can you guess a CVV number?
According to this article it is indeed somewhat possible. Researchers at Newcastle University in the UK recently decided to see just how effectively the second caveat [that the payment processor mustn't allow too many guesses at your CVV] was enforced, by trying to guess CVVs.
Is my CVV number on my statement?
The point of this code is to verify that you actually have your physical credit card when making a purchase, so it's usually not on your statement or available through online banking.