How much is C $1000 in U.S. dollars?

Could you please clarify for me how I can convert C$1000, the Canadian dollar amount, into its equivalent in U.S. dollars? I understand that the exchange rate fluctuates, so I'm wondering if there's a current or approximate value I can use to make this calculation. Additionally, I'm curious about what factors typically influence the Canadian dollar to U.S. dollar exchange rate and how often it changes.