Power pin needs to be 5V, but the SCL/SDA lines will be fine at 3.3V:
Logic 1 Input
VIH Min 2.2V Max VCC + 0.3V
Logic 0 Input VIL Min -0.3V Max +0.8V
PIN 5 SDA Serial Data Input/Output. SDA is the data input/output for the I2C serial interface. The SDA pin is open drain and requires an external pullup resistor. The pullup voltage can be up to 5.5V regardless of the voltage on VCC.
PIN 6 SCL Serial Clock Input. SCL is the clock input for the I2C interface and is used to synchronize data movement on the serial interface. The pullup voltage can be up to 5.5V regardless of the voltage on VCC.